Teledyne 3000ZA-3X - Trace oxygen analyzer - Manual (Page 29)

Trace Oxygen Analyzer Installation
Teledyne Analytical Instruments 17
pressure, (less than 2 psig) vacuum service plumbing is recommended.
Exact figures will depend on your process.
If greater sample flow is required for improved response time,
install a bypass in the sampling system upstream of the analyzer input.
EXHAUST OUT:
Exhaust connections must be consistent with the hazard level of the
constituent gases. Check local, state, and federal laws, and ensure that
the exhaust stream vents to an appropriately controlled area, if required.
ZERO IN and SPAN IN (Optional):
These are additional ports for inputting span and zero gas. There are
electrically operated valves inside for automatic switching between
calibration and sample gases. These valves are completely under control
of the 3000ZA electronics. They can be externally controlled only
indirectly through the remote cal inputs as described below. Note
however that each sensor is calibrated separately. Thus three span gas
mixtures are needed. It is recommended to leave connected the one for
the range that is used most, and calibrate the other two sensors manually.
Pressure, flow, and safety considerations are the same as prescribed for
the SAMPLE IN inlet above.
3.3.2 Electrical Connections
For safe connections, no uninsulated wiring should be able to come
in contact with fingers, tools or clothing during normal operation.
CAUTION: USE SHIELDED CABLES. ALSO, USE PLUGS THAT
PROVIDE EXCELLENT EMI/RFI PROTECTION. THE
PLUG CASE MUST BE CONNECTED TO THE CABLE
SHIELD, AND IT MUST BE TIGHTLY FASTENED TO
THE ANALYZER WITH ITS FASTENING SCREWS.
ULTIMATELY, IT IS THE INSTALLER WHO ENSURES
THAT THE CONNECTIONS PROVIDE ADEQUATE
EMI/RFI SIELDING.
3.3.2.1 P RIMARY I NPUT P OWER
The power cord receptacle and fuse block are located in the same
assembly. Insert the power cord into the power cord receptacle.